Product category:
Machine Safety Monitoring and Control
News Release from: Pilz Automation Technology | Subject: PNOZpower devices
Edited by the Engineeringtalk Editorial
Team on 30 January 2004
Device combines safety relay and
contactor
PNOZpower devices offer simplified wiring, require less space in a control cabinet and can be easily configured to suit different power switching demands or safety-related control schemes.
Designed as a better alternative to separate safety relays and contactors, the Pilz PNOZpower devices offer simplified wiring, require less space in a control cabinet and can be easily configured to suit different power switching demands or safety-related control schemes For example, instead of simply acting as the link between an emergency stop switch and a motor, a control module can be used that allows the device to be driven from conventional safety relays, Pilz PNOZelog electronic safety relays, Pilz PNOZmulti configurable safety controllers, programmable safety systems or safety fieldbuses
This article was originally published on Engineeringtalk on 15 Jul 2008 at 8.00am (UK)
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Status is indicated via LEDs on the front of the analogue input module and, if installed, via the PVIS intelligent diagnostics system and a suitable Pilz display.
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Pilz' competence management system means that it always knows exactly which of its engineers and consultants have the necessary skills.
Customers can select the modules that they need in order to provide the current capacity and control required.
Expander modules are available for switching AC or DC currents of 4, 8 or 16A, and the maximum capacity for each base unit is 40A.
Single-phase and three-phase loads can be switched, depending on the modules selected.
For connecting the devices to external circuits, customers can choose either plug-in terminals with screw clamps or plug-in terminals with cage-clamp terminals for the ultimate in simple, rapid wiring.
Plug-in terminals allow the wiring to be carried out without the device itself having to be available, and replacement units can be connected with no need to perform any wiring and without any risk of wiring errors being introduced.
Two types of base unit are available, with or without an adjustable timed output.
The timed output version is suitable for Category 1 stops on machinery with a run-down time.
All units feature a semiconductor output that can be used, for instance, to transmit a "status" signal to a PLC, and LEDs on the front assist with fault diagnosis.
Another useful module is the optional power supply that can be used when plant or machinery is being retrofitted with PNOZpower devices.
Using the power supply module enables AC voltages of 110 or 115V AC, for example, to be used as a control voltage.
Typical applications for the PNOZpower devices include the switching of motors, conveyors and solenoid-actuated valves.
The number of safe outputs depends on the expander modules selected, and a maximum of four expander modules can be connected to each base unit.
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